Multiple choice What is a cell membrane Convert solar energy to chemical energy A riged cover that provides support for the cell Thin flexable barrier around the cell The place where light energy is used Reveal answer Fill a bubble to check yourself C Correct answer Explanation The cell membrane is a thin, flexible lipid bilayer that surrounds the cytoplasm of a cell, controlling the movement of substances in and out. A rigid cover describes a cell wall, while converting solar energy describes chloroplasts.